Prospect Heights, Illinois demographics

Prospect Heights, IL demographics: median age 42.8; 41.3% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Prospect Heights city, Illinois · Incorporated city · GEOID 1762016. The survey estimates a population of 15,618 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Prospect Heights is 42.8 years, with a 90% margin of error of 3.1 years. There are 6,679 households (±430). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	42.8 ±3.1	39.0 ±0.1	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 15,618
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Under 18	2,608 ±444	16.7% ±2.8 pp	21.8%	22.0%
18–34	3,299 ±629	21.1% ±4.0 pp	22.7%	22.8%
35–64	6,660 ±702	42.6% ±4.5 pp	38.5%	38.0%
65 and older	3,051 ±525	19.5% ±3.4 pp	17.0%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 15,618
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Male	7,588 ±509	48.6% ±3.3 pp	49.4%	49.5%
Female	8,030 ±514	51.4% ±3.3 pp	50.6%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 15,618
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
White alone	9,922 ±900	63.5% ±5.8 pp	61.0%	61.0%
Black or African American alone	97 ±59 · low precision	0.6% ±0.4 pp · low precision	13.6%	12.2%
American Indian and Alaska Native alone	15 ±23 · low precision	0.1% ±0.1 pp · low precision	0.6%	0.9%
Asian alone	1,411 ±420	9.0% ±2.7 pp	6.0%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±20 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	2,149 ±792	13.8% ±5.1 pp	7.9%	7.1%
Two or more races	2,024 ±690	13.0% ±4.4 pp	10.9%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 15,618
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Not Hispanic or Latino	11,583 ±782	74.2% ±5.0 pp	81.2%	80.7%
Hispanic or Latino	4,035 ±783	25.8% ±5.0 pp	18.8%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 6,679
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Married-couple family	3,133 ±334	46.9% ±4.0 pp	45.3%	46.9%
Other family: male householder, no spouse present	240 ±165 · low precision	3.6% ±2.5 pp · low precision	4.9%	5.1%
Other family: female householder, no spouse present	884 ±245	13.2% ±3.6 pp	11.9%	12.2%
Nonfamily: householder living alone	2,083 ±525	31.2% ±7.6 pp	31.2%	28.7%
Nonfamily: householder not living alone	339 ±177 · low precision	5.1% ±2.6 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 6,679
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Households with people under 18	1,597 ±262	23.9% ±3.6 pp	28.6%	29.5%
Households without people under 18	5,082 ±588	76.1% ±7.3 pp	71.4%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 6,679
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
One-person nonfamily households	2,083 ±525	31.2% ±7.6 pp	31.2%	28.7%
Two-person households	2,316 ±367	34.7% ±5.0 pp	32.3%	33.8%
Three-person households	1,252 ±275	18.7% ±3.9 pp	14.7%	15.3%
Four-person households	569 ±164	8.5% ±2.4 pp	12.6%	12.6%
Five-person households	369 ±154	5.5% ±2.3 pp	5.8%	5.9%
Six-person households	11 ±23 · low precision	0.2% ±0.3 pp · low precision	2.1%	2.2%
Seven or more people	79 ±69 · low precision	1.2% ±1.0 pp · low precision	1.3%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 15,618
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Native	9,277 ±748	59.4% ±4.8 pp	85.3%	85.9%
Foreign born	6,341 ±744	40.6% ±4.8 pp	14.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 14,684
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
English only	7,061 ±935	48.1% ±6.3 pp	76.0%	77.7%
Spanish	3,111 ±697	21.2% ±4.7 pp	14.0%	13.6%
French, Haitian, or Cajun	18 ±24 · low precision	0.1% ±0.2 pp · low precision	0.3%	0.7%
German or other West Germanic	34 ±31 · low precision	0.2% ±0.2 pp · low precision	0.3%	0.5%
Russian, Polish, or other Slavic	2,960 ±623	20.2% ±4.2 pp	2.5%	0.7%
Other Indo-European	374 ±242 · low precision	2.5% ±1.6 pp · low precision	2.6%	2.0%
Korean	99 ±94 · low precision	0.7% ±0.6 pp · low precision	0.3%	0.3%
Chinese, including Mandarin and Cantonese	20 ±34 · low precision	0.1% ±0.2 pp · low precision	0.9%	1.1%
Vietnamese	3 ±4 · low precision	0.0% ±0.0 pp · low precision	0.2%	0.5%
Tagalog, including Filipino	202 ±205 · low precision	1.4% ±1.4 pp · low precision	0.7%	0.6%
Other Asian and Pacific Island	492 ±260 · low precision	3.4% ±1.8 pp · low precision	1.0%	1.1%
Arabic	173 ±249 · low precision	1.2% ±1.7 pp · low precision	0.6%	0.5%
Other and unspecified	137 ±116 · low precision	0.9% ±0.8 pp · low precision	0.6%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 12,005
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Less than high school graduate	2,047 ±542	17.1% ±4.4 pp	9.5%	10.4%
High school graduate or equivalency	2,111 ±432	17.6% ±3.5 pp	25.1%	26.0%
Some college, no degree	1,992 ±428	16.6% ±3.5 pp	19.2%	19.1%
Associate’s degree	900 ±303	7.5% ±2.5 pp	8.3%	8.8%
Bachelor’s degree	3,431 ±562	28.6% ±4.5 pp	22.6%	21.6%
Graduate or professional degree	1,524 ±322	12.7% ±2.6 pp	15.3%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 15,531
Category	Count ± MOE	Share ± MOE (pp)	Illinois	U.S.
Same house	13,462 ±489	86.7% ±3.1 pp	88.9%	87.7%
Moved within same county	1,411 ±397	9.1% ±2.6 pp	6.4%	6.3%
Moved from a different county in the same state	275 ±198 · low precision	1.8% ±1.3 pp · low precision	2.4%	3.1%
Moved from a different state	94 ±115 · low precision	0.6% ±0.7 pp · low precision	1.6%	2.3%
Moved from abroad	289 ±168 · low precision	1.9% ±1.1 pp · low precision	0.6%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

18.3% of Prospect Heights residents (±3.6 percentage points) had no health insurance coverage when surveyed, compared with 6.9% in Illinois and 8.4% nationally. 90.7% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	Prospect Heights	Illinois	U.S.	Compared with Illinois
People without health insurance Civilian noninstitutionalized population	18.3% ±3.6 pp	6.9%	8.4%	Higher
Households with a broadband subscription Households	90.7% ±2.2 pp	90.8%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	3.5% ±1.6 pp	4.8%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for Prospect Heights . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read Prospect Heights housing and cost context or return to the city profile.